60 minutes did tonite a thing on 'A Blow to the Brain' about football. But it does have lots of relevance to other contact sports [and non-contact sports as well] Here is the link:
http://www.cbsnews.com/video/watch/?id=5377319n
The reason I encourage you to pay attention to this? IS that concussions can show up on MRI's 5-10-20-30+ years later. I speak from experience here. Apparently your brain and any 'dings' you mite have had from age 0 on eventually show up on MRI's or other types of scans. I'd had one of the 'other' type of scans and I was asked about prior head traumas...I first thought recently, such as 10 or 15 years ago? [Hey! I'm older than you, but got dinged up good in my day too!] and I really had to replay my life to recall how many times I'd fallen off horses [and when, and hard] that I'd considered totally unimportant to my tests! They can be important now. Those 'dings' and bungs show up on your brain as light, dark or 'nothing' spaces on many special scans. Essentially if you fell off your bike at age 7 and got a concussion then? It Will Show UP! And It mite or not mean anything. Doesn't mean to panic now, just remember it for life and know that you must take care now so you won't have to worry in the long run!
That 'disconnect' stuff is totally unpleasant! It takes time for things to get re-programmed, kind of like a computer w/glitches? But,time is all you need, after which you will be back at all things with a vengeance! 's - j